gianfar: Remove unused device_node ref in gfar_private

Remove unused device node pointer.
Remove duplicated SET_NETDEV_DEV().

Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/ethernet/freescale/gianfar.c
Simple merge

diff --cc drivers/net/ethernet/freescale/gianfar.h
Simple merge